有没有办法用php核心代码访问WordPress数据库？

global $wpdb;
$results = $wpdb->get_results("SELECT post_title, post_content FROM {$wpdb->prefix}posts WHERE post_type = 'post'");
foreach ($results as $result) {
    echo $result->post_title . ': ' . $result->post_content . '<br>';
}

global $wpdb;
$data = array(
    'post_title' => 'New Post',
    'post_content' => 'This is a new post.',
    'post_type' => 'post',
);
$wpdb->insert("{$wpdb->prefix}posts", $data);

global $wpdb;
$data = array(
    'post_title' => 'Updated Post Title',
);
$where = array(
    'ID' => 1,
);
$wpdb->update("{$wpdb->prefix}posts", $data, $where);

global $wpdb;
$where = array(
    'ID' => 1,
);
$wpdb->delete("{$wpdb->prefix}posts", $where);